mystery" provides a summary (2) theories explain mystery. Because theories sound -fetched, include source promoter theory -- a scientist, a historian, a theologian,

The mystery of Giza: How was the Pyramid of Giza constructed?

One of the great mysteries of the ancient world is how the Pyramids of Giza was constructed. One of the Seven Wonders of the World, and the only remaining wonder, the historian Herodotus stated that slave labor, using ramps, was the primary method used when constructing the impressive structure:

He [Cheops] closed the temples, and forbade the Egyptians to offer sacrifice, compelling them instead to labour, one and all, in his service. Some were required to drag blocks of stone down to the Nile from the quarries in the Arabian range of hills; others received the blocks after they had been conveyed in boats across the river, and drew them to the range of hills called...
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